AP1501A

Features:

- Output voltage: 3.3V, 5V, 12V and adjustable output version
- Adjustable version output voltage range, 1.23V to 37V+4%
- 150Khz +15% fixed switching frequency
- Voltage mode non-synchronous PWM control
- Thermal-shutdown and current-limit protection
- ON/OFF shutdown control input
- Operating voltage can be up to 40V
- Output load current: 5A
- TO220-5L, TO220-5L(R) and TO263-5L packages
- Low power standby mode
- Built-in switching transistor on chip




Application

- Simple High-efficiency step-down regulator
- On-card switching regulators
- Positive to negative converter






Pinout






Specifications

Part Number	AP1501A
Efficiency (%)	88
Frequency (Hz) typ	150K Fixed
Min and Max Input Voltage (V)	4.5 ~ 40
Output Current (A)	5
Output Voltage (V)	3.3/ 5/ 12/ ADJ 1.23 to 37
Standby Quiescent Current (uA) typ	150
Type	Buck

Symbol	Parameter	Rating	Unit
VCC	Supply Voltage	+45	V
VSD	ON/OFF Pin input voltage	-0.3 to +25	V
VFB	Feedback Pin voltage	-0.3 to +25	V
VOUT	Output voltage to Ground	-1	V
PD	Power dissipation	Internally limited	W
TST	Storage temperature	-65 to +150
TOP	Operating temperature	-40 to +125
VOP	Operating voltage	+4.5 to +40	V

Description

The AP1501A series are monolithic IC that design for a step-down DC/DC converter, and own the ability of driving a 5A load without additional transistor component. Due to reducing the number of external component, the board space can be saved easily. The external shutdown function can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control have good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. The AP1501A series operates at a switching frequency of 150Khz thus allowing smaller sized filter components than what would be
needed with lower frequency switching regulators. Other features of AP1501A include a guaranteed +4% tolerance on output voltage under specified input voltage and
output load conditions, and +15% on the oscillator frequency. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The packages are
available in a standard 5-lead TO-220 package and a 5-lead TO-263.